The Rubber trim between the fender and flare I cleaned with Carpet cleaner and a toothbrush. I tried Iso-heet too with better luck. I found out the longer chemical sat on it the better it cleaned up.
As far as the clear plastic film, I used a heat gun and slowly removed it. My Rubber eraser disc helped too.
These were still available from dealer in 2020 since I ordered them. The delear was doing other things but would not install them - afraid the removal would mess up the old paint